/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2000-2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 1999, International
 * Business Machines, Inc., http://www.apache.org.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package com.sun.org.apache.xerces.internal.xni;

/**
 * A structure that holds the components of an XML Namespaces qualified
 * name.
 * <p>
 * To be used correctly, the strings must be identical references for
 * equal strings. Within the parser, these values are considered symbols
 * and should always be retrieved from the <code>SymbolTable</code>.
 *
 * @author Andy Clark, IBM
 *
 *         Better performance patch for the equals method by Daniel Petersson: refer to jaxp issue
 *         61; == were used to compare strings
 * @author Joe Wang, Oracle
 * @version $Id: QName.java,v 1.6 2010/03/18 19:32:31 joehw Exp $
 * @see <a href="../../../../../xerces2/com/sun/org/apache/xerces/internal/util/SymbolTable.html">com.sun.org.apache.xerces.internal.util.SymbolTable</a>
 */
public class QName
    implements Cloneable {


  /**
   * The qname prefix. For example, the prefix for the qname "a:foo"
   * is "a".
   */
  public String prefix;

  /**
   * The qname localpart. For example, the localpart for the qname "a:foo"
   * is "foo".
   */
  public String localpart;

  /**
   * The qname rawname. For example, the rawname for the qname "a:foo"
   * is "a:foo".
   */
  public String rawname;

  /**
   * The URI to which the qname prefix is bound. This binding must be
   * performed by a XML Namespaces aware processor.
   */
  public String uri;

  //
  // Constructors
  //

  /**
   * Default constructor.
   */
  public QName() {
    clear();
  } // <init>()

  /**
   * Constructs a QName with the specified values.
   */
  public QName(String prefix, String localpart, String rawname, String uri) {
    setValues(prefix, localpart, rawname, uri);
  } // <init>(String,String,String,String)

  /**
   * Constructs a copy of the specified QName.
   */
  public QName(QName qname) {
    setValues(qname);
  } // <init>(QName)

  //
  // Public methods
  //

  /**
   * Convenience method to set the values of the qname components.
   *
   * @param QName The qualified name to be copied.
   */
  public void setValues(QName qname) {
    prefix = qname.prefix;
    localpart = qname.localpart;
    rawname = qname.rawname;
    uri = qname.uri;
  } // setValues(QName)

  /**
   * Convenience method to set the values of the qname components.
   *
   * @param prefix The qname prefix. (e.g. "a")
   * @param localpart The qname localpart. (e.g. "foo")
   * @param rawname The qname rawname. (e.g. "a:foo")
   * @param uri The URI binding. (e.g. "http://foo.com/mybinding")
   */
  public void setValues(String prefix, String localpart, String rawname,
      String uri) {
    this.prefix = prefix;
    this.localpart = localpart;
    this.rawname = rawname;
    this.uri = uri;
  } // setValues(String,String,String,String)

  /**
   * Clears the values of the qname components.
   */
  public void clear() {
    prefix = null;
    localpart = null;
    rawname = null;
    uri = null;
  } // clear()

  //
  // Cloneable methods
  //

  /**
   * Returns a clone of this object.
   */
  public Object clone() {
    return new QName(this);
  } // clone():Object

  //
  // Object methods
  //

  /**
   * Returns the hashcode for this object.
   */
  public int hashCode() {
    if (uri != null) {
      return uri.hashCode() +
          ((localpart != null) ? localpart.hashCode() : 0);
    }
    return (rawname != null) ? rawname.hashCode() : 0;
  } // hashCode():int

  /**
   * Returns true if the two objects are equal.
   */
  public boolean equals(Object object) {
    if (object == this) {
      return true;
    }

    if (object != null && object instanceof QName) {
      QName qname = (QName) object;
      if (qname.uri != null) {
        return qname.localpart.equals(localpart) && qname.uri.equals(uri);
      } else if (uri == null) {
        return rawname.equals(qname.rawname);
      }
      // fall through and return not equal
    }
    return false;
  } // equals(Object):boolean

  /**
   * Returns a string representation of this object.
   */
  public String toString() {

    StringBuffer str = new StringBuffer();
    boolean comma = false;
    if (prefix != null) {
      str.append("prefix=\"" + prefix + '"');
      comma = true;
    }
    if (localpart != null) {
      if (comma) {
        str.append(',');
      }
      str.append("localpart=\"" + localpart + '"');
      comma = true;
    }
    if (rawname != null) {
      if (comma) {
        str.append(',');
      }
      str.append("rawname=\"" + rawname + '"');
      comma = true;
    }
    if (uri != null) {
      if (comma) {
        str.append(',');
      }
      str.append("uri=\"" + uri + '"');
    }
    return str.toString();

  } // toString():String

} // class QName
